顶管穿越高速公路工程影响分析

Influence Analysis of the Pipe Jacking Through Highway Foundation

顶管穿越已固结完成的高速公路地基,将引起土体扰动和土层损失,使路堤产生纵、横向不均匀沉降。文章阐述了顶管穿越高速公路路堤所引起的土层变形规律,分析了其成因;在经验公式法和解析法对比分析的基础上,建议采用修正的Sagaseta公式计算地面变形;并依托工程实例,探讨了显著影响顶管施工产生的地表变形的因素,得出了一些有益的结论。

When the pipe jacking through consolidated expressway embankment, differential settlements will be produced in cross section and longitudinal direction of the embankment due to the ground disturbance and ground loss caused by pipe jacking construction. The ground surface deformation caused by the pipe jacking through the highway foundation were described, the causes were analyzed; Based on the comparative analysis of the empirical methods and analytic methods, the modified sagaseta formula was recommended to calculate the ground deformation;And relying on the engineering example, the significant factors affect the surface deformation were discussed and some useful conclusion were drawn.